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106 lines
3.6 KiB
Text
106 lines
3.6 KiB
Text
dnl @synopsis ACX_MPI([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
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dnl @summary figure out how to compile/link code with MPI
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dnl @category InstalledPackages
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dnl
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dnl This macro tries to find out how to compile programs that
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dnl use MPI (Message Passing Interface), a standard API for
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dnl parallel process communication (see http://www-unix.mcs.anl.gov/mpi/)
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dnl
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dnl On success, it sets the MPICC, MPICXX, or MPIF77 output variable to
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dnl the name of the MPI compiler, depending upon the current language.
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dnl (This may just be $CC/$CXX/$F77, but is more often something like
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dnl mpicc/mpiCC/mpif77.) It also sets MPILIBS to any libraries that are
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dnl needed for linking MPI (e.g. -lmpi, if a special MPICC/MPICXX/MPIF77
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dnl was not found).
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dnl
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dnl If you want to compile everything with MPI, you should set:
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dnl
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dnl CC="$MPICC" #OR# CXX="$MPICXX" #OR# F77="$MPIF77"
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dnl LIBS="$MPILIBS $LIBS"
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dnl
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dnl NOTE: The above assumes that you will use $CC (or whatever)
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dnl for linking as well as for compiling. (This is the
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dnl default for automake and most Makefiles.)
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dnl
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dnl The user can force a particular library/compiler by setting the
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dnl MPICC/MPICXX/MPIF77 and/or MPILIBS environment variables.
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dnl
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dnl ACTION-IF-FOUND is a list of shell commands to run if an MPI
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dnl library is found, and ACTION-IF-NOT-FOUND is a list of commands
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dnl to run it if it is not found. If ACTION-IF-FOUND is not specified,
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dnl the default action will define HAVE_MPI.
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dnl
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dnl @version 2005-09-02
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dnl @license GPLWithACException
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dnl @author Steven G. Johnson <stevenj@alum.mit.edu>
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AC_DEFUN([ACX_MPI], [
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AC_PREREQ(2.50) dnl for AC_LANG_CASE
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AC_LANG_CASE([C], [
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AC_REQUIRE([AC_PROG_CC])
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AC_ARG_VAR(MPICC,[MPI C compiler command])
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AC_CHECK_PROGS(MPICC, mpicc hcc mpcc mpcc_r mpxlc cmpicc, $CC)
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acx_mpi_save_CC="$CC"
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CC="$MPICC"
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AC_SUBST(MPICC)
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],
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[C++], [
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AC_REQUIRE([AC_PROG_CXX])
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AC_ARG_VAR(MPICXX,[MPI C++ compiler command])
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AC_CHECK_PROGS(MPICXX, mpic++ mpiCC mpicxx mpCC hcp mpxlC mpxlC_r cmpic++, $CXX)
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acx_mpi_save_CXX="$CXX"
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CXX="$MPICXX"
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AC_SUBST(MPICXX)
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],
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[Fortran 77], [
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AC_REQUIRE([AC_PROG_F77])
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AC_ARG_VAR(MPIF77,[MPI Fortran compiler command])
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AC_CHECK_PROGS(MPIF77, mpif77 hf77 mpxlf mpf77 mpif90 mpf90 mpxlf90 mpxlf95 mpxlf_r cmpifc cmpif90c, $F77)
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acx_mpi_save_F77="$F77"
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F77="$MPIF77"
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AC_SUBST(MPIF77)
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])
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if test x = x"$MPILIBS"; then
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AC_LANG_CASE([C], [AC_CHECK_FUNC(MPI_Init, [MPILIBS=" "])],
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[C++], [AC_CHECK_FUNC(MPI_Init, [MPILIBS=" "])],
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[Fortran 77], [AC_MSG_CHECKING([for MPI_Init])
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AC_TRY_LINK([],[ call MPI_Init], [MPILIBS=" "
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AC_MSG_RESULT(yes)], [AC_MSG_RESULT(no)])])
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fi
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if test x = x"$MPILIBS"; then
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AC_CHECK_LIB(mpi, MPI_Init, [MPILIBS="-lmpi"])
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fi
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if test x = x"$MPILIBS"; then
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AC_CHECK_LIB(mpich, MPI_Init, [MPILIBS="-lmpich"])
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fi
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dnl We have to use AC_TRY_COMPILE and not AC_CHECK_HEADER because the
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dnl latter uses $CPP, not $CC (which may be mpicc).
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AC_LANG_CASE([C], [if test x != x"$MPILIBS"; then
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AC_MSG_CHECKING([for mpi.h])
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AC_TRY_COMPILE([#include <mpi.h>],[],[AC_MSG_RESULT(yes)], [MPILIBS=""
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AC_MSG_RESULT(no)])
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fi],
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[C++], [if test x != x"$MPILIBS"; then
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AC_MSG_CHECKING([for mpi.h])
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AC_TRY_COMPILE([#include <mpi.h>],[],[AC_MSG_RESULT(yes)], [MPILIBS=""
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AC_MSG_RESULT(no)])
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fi])
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AC_LANG_CASE([C], [CC="$acx_mpi_save_CC"],
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[C++], [CXX="$acx_mpi_save_CXX"],
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[Fortran 77], [F77="$acx_mpi_save_F77"])
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AC_SUBST(MPILIBS)
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# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
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if test x = x"$MPILIBS"; then
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$2
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:
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else
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ifelse([$1],,[AC_DEFINE(HAVE_MPI,1,[Define if you have the MPI library.])],[$1])
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:
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fi
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])dnl ACX_MPI
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